Design and Optimization of Different Shape Slotted Patch Antenna for IoT Applications

This study presents a novel design for a compact, slotted patch antenna tailored for Internet of Things (IoT) applications, operating within the 3-3.3 GHz frequency range. The proposed antenna, fabricated on a cost-effective FR-4 substrate with a thickness of 1.6 mm and a relative permittivity of 4.4, boasts a compact footprint of 36x36x1.6 mm<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup>. To enhance its radiative properties, the patch antenna incorporates various slot configurations, including L-shaped, H-shaped, and circular slots. Simulation results, obtained using Computer Simulation Technology (CST) software, reveal outstanding performance metrics, including a return loss of -24.99 dB, a gain of 6.82 dB, and a directivity of 6.8 dBi at a resonant frequency of 3.16 GHz. The antenna's compact size, high performance, and low fabrication costs make it an attractive solution for a range of IoT applications, including wireless sensor networks, smart home devices, and wearable electronics. The design parameters of the antenna have been optimized to achieve a balance between gain, directivity, and bandwidth, resulting in a highly efficient antenna. Furthermore, the antenna's radiation patterns have been evaluated, demonstrating an omnidirectional radiation characteristic, which is desirable for many IoT applications.